Unexpected garden visitors

I've seen weasels a couple of times (in the 40 years I've been here) but not seen any in last few years. Both times it was a family with several young, once running up and down a discarded plank playing.

The only other time I saw something like a stoat was when we had some guinea fowl in a shed. I heard them squealing and went to see what was the problem and when I got there they were all dead and a white thing was in a corner looking quite vicious. It could have been a stoat. I thought it looked quite big and was definitely white. I may have seen it as bigger than it was because I was very close. I got out of the way to let it out.